<?php

    /**
     * PHPExcel_Writer_Excel5_Font
     * Copyright (c) 2006 - 2015 PHPExcel
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2.1 of the License, or (at your option) any later version.
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
     * @category   PHPExcel
     * @package    PHPExcel_Writer_Excel5
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
     * @version    ##VERSION##, ##DATE##
     */
    class PHPExcel_Writer_Excel5_Font {
        /**
         * Map of BIFF2-BIFF8 codes for underline styles
         * @static    array of int
         */
        private static $mapUnderline = [
            PHPExcel_Style_Font::UNDERLINE_NONE             => 0x00,
            PHPExcel_Style_Font::UNDERLINE_SINGLE           => 0x01,
            PHPExcel_Style_Font::UNDERLINE_DOUBLE           => 0x02,
            PHPExcel_Style_Font::UNDERLINE_SINGLEACCOUNTING => 0x21,
            PHPExcel_Style_Font::UNDERLINE_DOUBLEACCOUNTING => 0x22,
        ];
        /**
         * Color index
         * @var int
         */
        private $colorIndex;
        /**
         * Font
         * @var PHPExcel_Style_Font
         */
        private $font;

        /**
         * Constructor
         * @param PHPExcel_Style_Font $font
         */
        public function __construct(PHPExcel_Style_Font $font = null) {
            $this->colorIndex = 0x7FFF;
            $this->font       = $font;
        }

        /**
         * Set the color index
         * @param int $colorIndex
         */
        public function setColorIndex($colorIndex) {
            $this->colorIndex = $colorIndex;
        }

        /**
         * Get font record data
         * @return string
         */
        public function writeFont() {
            $font_outline = 0;
            $font_shadow  = 0;
            $icv = $this->colorIndex; // Index to color palette
            if ($this->font->getSuperScript()) {
                $sss = 1;
            } elseif ($this->font->getSubScript()) {
                $sss = 2;
            } else {
                $sss = 0;
            }
            $bFamily  = 0; // Font family
            $bCharSet = PHPExcel_Shared_Font::getCharsetFromFontName($this->font->getName()); // Character set
            $record   = 0x31;        // Record identifier
            $reserved = 0x00;    // Reserved
            $grbit    = 0x00;        // Font attributes
            if ($this->font->getItalic()) {
                $grbit |= 0x02;
            }
            if ($this->font->getStrikethrough()) {
                $grbit |= 0x08;
            }
            if ($font_outline) {
                $grbit |= 0x10;
            }
            if ($font_shadow) {
                $grbit |= 0x20;
            }
            $data = pack("vvvvvCCCC", // Fontsize (in twips)
                         $this->font->getSize() * 20, $grbit, // Colour
                         $icv, // Font weight
                         self::mapBold($this->font->getBold()), // Superscript/Subscript
                         $sss, self::mapUnderline($this->font->getUnderline()), $bFamily, $bCharSet, $reserved
            );
            $data .= PHPExcel_Shared_String::UTF8toBIFF8UnicodeShort($this->font->getName());
            $length = strlen($data);
            $header = pack("vv", $record, $length);
            return ($header . $data);
        }

        /**
         * Map to BIFF5-BIFF8 codes for bold
         * @param boolean $bold
         * @return int
         */
        private static function mapBold($bold) {
            if ($bold) {
                return 0x2BC;  //  700 = Bold font weight
            }
            return 0x190;      //  400 = Normal font weight
        }

        /**
         * Map underline
         * @param string
         * @return int
         */
        private static function mapUnderline($underline) {
            if (isset(self::$mapUnderline[$underline])) {
                return self::$mapUnderline[$underline];
            }
            return 0x00;
        }
    }
